Digging element for excavating machines



Aug. 23, 1932. D. H. YOUNG ,87

DIGGING ELEMENT FOR EXCAVATING MACHINES Filed M h 10. 1 -2 Sheets-Sheet l Aug. 23, 1932. D. H. YGUNG DIGGING ELEMENT FOR .EXCAVATING MACHINES Filed March 10, 1930 2 Sheets-Sheet 2 O O O I w aw lau

Patented Aug. 23, 1932 UNITED STATES PATENT OFFICE DONALD H. YOUNG, OF BERKELEY, CALIFORNIA, ASSIGNOB TO AMERICAN MANGANESE STEEL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF MAINE DIGGING ELEMENT FOR EXCAVATING MACHINES Application filed March 10, 1930. Serial No. 434,499.

This invention relates to a bucket or other like digging elements for use in excavating.

machines and having a separately formed digging lip replaceably applied by lapping Because of the oblate form of the openfront of a bucket of this kind and the neces-' sity of extending the replaceable lip and its attaching flange, up the sides and beyond the major axis of the open front, combined with the convergence rearwardly (as to the direction of travel) of the principal external surfaces of the bucket, .it has heretofore been necessary, in applying the lip, to place the side-protecting legs of the lip astride the bucket in a rearwardly inclined position and then swing the lip forwardly until it came into bearing at riveting position. This operation precluded the employment of abutting shoulders behind the side-protecting legs of the lip, and, except at a limited middle sector of the bucket, left to the shear resistance of the rivetsalone, the sustention of the very considerable areas of the li s at the sides of the bucket against formida le forces of thrust encountered in use, Where the lip first begins to fail when it of its use. 7 j

The present invention consists, primarily,

nears the limit in combining with a dredge bucket of the rearwardly contracting type having a curving (usually ellipsoidal) open end, a wearing lip having a conforming external riveting flange extending up the sides of the bucket to points beyond the major axis of the front opening, and in abutment rearwardly against lugs inte 'rally located on the bucket in thrustsustaining relation to the side-protecting portions of the 1: p features collateral to the said rimary feature or incidental to the preerred embodiment of the invention, consisting in having, in addition to these side-sustaining lugs, a thrust sustaining abutment between said side abutments, for instance, an intermediate lug on the bucket, or a shoulder on the middle of the lip abutting the forward edge of the bucket, or both said intermediate lug and said shoulder to distribute thrustsustention of the lip throughout the lip.

In carrying out the invention, the external marginal surfaces adjacent the open front end of the bucketwhich constitute the seat for the riveting flange of the lip are formed both as to contour in a transverse plane and as to rearward convergence of said marginal surfaces at least as far back as the transverse plane of the sustaining lugs in such manner, that the riveting flange of the lip with its conforming internal sur-' faces, and particularly the closely spaced portions of the lip which embrace the sides of the seat beyond the major transverseaxis of the bucket, can pass along the deepest portions of the flange seat until the major axis is passed, whereupon, by continued sliding of the ends of the legs of the lip along the seat, acompanied by rearward swinging of the middle portion of the lip, the flange of the lip can be brought'to full seating upon the converging marginal seat of the bucket in rearward thrust-transmitting abutment against the bucket at the sides as well as at a point or points intermediate of the sides.

In the accompanying drawings, in which one embodiment of the invention is shown by way of illustration.

of a bucket designed to enter into an endless Figure 1 isa vertical longitudinal section dredgin chain of buckets, and having a replaceable lip mounted thereon inaccordance with the present invention.

Figure 2 is a side elevation of the bucket shown in Figure 1;

Figure 3 is a front elevation; Figure 4 is a plan view looking in the direction of the arrow in Figures 1 and 2; and Figures 5, 5a, 5b, and 5c are schematic views illustrating the method of manipulation permitted by the relative constructions of the lip and bucket in bringing the parts together. 1 represents a bowl-like front of bucket constructed with its open end 2 protected by replaceable lip 3, and 4 represents the back or base of the bucket upon which the front 1 is mounted (preferably bycasting them integral) and which is provided with pintle eyes 5, 6 adapting the bucket to assume the relation ofa link in an endless chain of buckets commonly employed in certain types of dredging; The lip 3 extends from the middle X of the front of the bucket l to the points Y which are well beyond the major axis Z of of giving the clearance necessary for effectivedigging, to taper the bucket sharply rearward from its open front end; and it has also been found desirable to give the bucket a transverse section of ellipsoidal form. These conditions complicate the problem of applying a renewable lip because of the rearwardly converging surfaces to be contended with, and particularly when the legs of the lip which protect the outer sides of the bucket, or at least the attaching flanges thereof, are extended beyond the major axis of the lips. These conditions have heretofore necessitated the omission of the side abutment lugs 9 on the bucket 1 for the reason that it was not practicable to slide the lip 3 in a direction perpendicular to the plane of the lip, or parallel with the plane of Figure 3 because the ends 1011 of the legs that overlap the sides of the bucket extend beyond the major axis Z, and therefore are spaced apart materially less than the length of said axis. Nor was it possible toslide the lip rearwardly from a position in front of the bucket because the rear edges of the riveting flange 10, corresponding to the deepest portion of the seat 11 that receives said flange, were spaced apart a distance materially less than the greater transverse dimensions of said seat. Accordingly, as stated, the lugs 9 couldnot be used, and it was customary to apply the lip astride the front end of the bucket with the portions that cover the sides of the bucket inclined rearwardly sufliciently to permit them to pass a reduced portion of the bucket, after which they were swung forwardly to riveting position.

According to the present invention, the distance between the two points Y of the extensions 10a of the riveting flange 10 is not less than the major axis of the bucket in the plane Y of the deepest portion of the seat 11, so that if the lip be presented to the bucket in the Lancet dotted line position A of Figure 5, and slid along the seat'll until arrested, and then swung to an angle corresponding to the position of Figure 5a and slid further inward, the lip could thereafter be swung successively to the positions of Figures 5?) and 50, with simultaneous sliding further toward the seat, and finally to the full riveting position, when the parts will fitsnugly ready for riveting, the shoulder 7 being against the front edge of the bucket, and the riveting lip 10 being in thrust abutment against middle lug 8 and the two side lugs 9, thereby achieving the ideal position for sustaining the lip on the bucket.

I claim:

1. An excavating bucket having a curving open end, external marginal lip-seating surfaces extending from the outermost portion of the bucket along the sides thereof and converging rearwardlyfrom said, open end, in combination with an abutting lip having a flange seating upon and conforming to said marginal surfaces and abutting agalnst said shoulders; said lip overlying the sides of said bucket to points beyond the major axis of the bucket.

2. An excavating bucket having an ellipsoidal open end with external marginal lipseating surfaces converging rearwardly from said end, in combination with a replaceable lip fitted upon said marginal surfaces; there being abutment between said bucket'and said lip, at the sides of said bucket, and at a point intermediate of said sides, transmitting thrust from the lip to the bucket in the line of travel ofthe bucket; and said lip extending from an intermediate abutment to points on the sides of the bucket beyond the major axis of its open end.

3. An excavating bucket having an ellipsoidal 0 en end, external marginal lip-seating sur aces convergingv rearwardly from said open end, and thrust abutment faces at its sides in combination with a lip having a flange seating upon and con rmi-ng to said marginal surfaces and abutt'ng against said faces said lip overlying t1 e sides of said bucket to points beyond the major axis oft-he bucket; the space between the extreme ends of the flange of the lip being not less than the major dimension of the bucket at the deepest portion of the seat formed by its tapered marginal surfaces; and said lip being adapted by combined swinging and sliding movement to traverse said seat by the ends of said flanges, and by simultaneous angular movement assume a full seating position upon the bucket. d I

Signed at Chicago Heights, Ill., this 1st day of March, 1930.

. DONALD YOUNG. 

